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Патент USA US2116000

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May 3, 1938.
. R. o.ÈPETERsoN
lFiled March 8, 1955l
‘I FIG.' j
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Powdered Me?a/
A Tram/sy
- Rubeno. Petersen, Glen Ellyn, lll., assigner to
Victor Manufacturing & Gasket Company, Chl
cago, Ill., a. corporation or Iliinois
`Application March li, 1935, Serial No. 10,050
This invention relates to an improved coating
for gaskets and the like, and has for one of its
principal objects the provision of a material
which shall render the gasket impervious to wa
5 ter, oil, gasoline, alcohol and other chemicals,
and which shall further render the same prooi
against electrolytic action.
acts as an insulator. \
The 'coating also
Anotherimportant object of the invention is
to provide a gasket coating which is capable of
` being applied in relatively small amounts and ot
a minimum thickness in that it will not penetrate
the material oi the gasket itself, such as asbestos
iibers or the like, but which will, at the same
time, aiîord adequate protection against pene
tration of the saine by other materials.
A still further object of the invention is to
produce a coating for gaskets which can be ap
plied by means of dipping, spraying, or _which
20 can even be printed thereon by means of print
. ing rollers or the'like, and which will be quite
flexible and resilient, so that it will not chip or
Figure 3 shows an asbestos gasket with metal
layers on its face and with improved processed
hydrocarbon coating of this invention applied to '
theouter face of the metal.
Figure 4 illustrates an asbestos gasket with 5
an inner metal reinforcement and with the coat
ing 4olf this invention applied directly to the as
bestos and penetrating to some extent the sur
face thereof.
Figure 5 shows a gasket somewhat similar to
that illustrated in Figure ‘l with an additional
coating applied to and over the first coating.
Figure 6 illustrates a plain asbestos gasket
with a coating such as that of Figure 4 and with
a further coating of powdered metal on'the outer
Figure 7 illustrates an asbestos gasket prelim
inarily covered with paper or the like and with
the improved coating of this invention applied to
the paper.
8 illustrates an asbestos gasket, one face
scale off the gasket either the asbestos or metal _ «of which is coated with a synthetic resin, after »
portions thereof, and which, furthermore, has
25 remarkable adhesive properties.
A still further important object of the inven
tion is tol provide a gasket coating which will
withstand temperatures of 1000*’ F. and which
` will, at all times, allow the interior of the gasket
30 material to retain its resilient qualities, while,
at the same time, protecting the exterior from
tackiness or liability to adhere or stick to the
cylinder head or block.
Another object is the provision oiY a coating
35 which canv be used in conjunction with some
foundation material, as, for example, la thin
sheet of paper and which can then be applied to
a gasket for protective purposes so as to avoid
undesirable scumng or loosening of the asbestos
fibers while handling, and which will, at the same
time, retain all its fire, water and oil proofing
which the improved coating of this invention is
applied 'to the resin.
Figure 9 shows a further type of asbestos gas 25
ket, the surfaces/of which are ñrst covered with
the improved coating of this invention, after
which graphite is applied. Obviously, the di
mensions of the coatings are somewhat exagger
ated in the drawing in order to make for a better 30
understanding of the ñgures. `
The improved coating oi’ this invention is com
posed of a processed hydro~carbon known as
elaterite and is prepared with a coal tar or a
naphtha solvent in equal amounts with the 35
elaterite in an autoclave under pressure and
gradually heating up to a temperature not more
than i300o F. which digests the elaterite.
This digested material can then be used as a
coating for a gasket or for any other purpose 40
wherein a coating impervious to water, oil, al
. cohol and similar materials is desired and where
Other and further important objects of the the coating is adapted to resist
temperatures up
invention will be apparent from the disclosures to 1000‘l F.
in the accompanying drawing and following
The material is su?ciently resilient so that it
'I'he invention, in a preferred form, is herein
after more fully described.
In the drawing:
Figure 1 is a top plan view of a representa
tive gasket showing the improved coating of this
invention applied thereto.
Figure 2 is a cross section oi a gasket of metal
5 Ul
with one of the improved coatings of this inven
tion thereon and applied to both faces thereof.
will not chip or scale oit a gasket under all nor
mal operating conditions.' lï‘urther, it will adhere' to either metal, asbestos, or other gasket mate
rials with remarkable tenacity.
`The insulating qualities of this coating are 60
such that- all electrolytic action will be positively
prevented between different metals even under
the most severe operating conditions encountered
in the use of' internal combustion engines. In
this manner, undesirable corrosive action is 55
porous as possible, two coats of elaterite should
be used or a coat of elaterite over some other
priming coat, as, for example, a synthetic resin
or lacquer.
eliminated, and the use of gaskets made entirely
of metal is rendered possible.
Thefcoating can be applied by> dipping, spray
ing or‘ by simply running the gasket or other
material to be coated through printing rollers
Gaskets composed entirely of metal maybe
coated with this material to render .them im
pervious to the action of various fluids and to
or the like by means of which this elaterite
, coating can be applied simply and economically
and without any` waste. It has been found that
a coating of not more than one one-thousandth
of an inch is sufficient for all practical purposes.
also afford a more resilient structure.
Such an
all-metal gasket cannot be absolutely water
If desired, the coating need not be applied
directlyv to the surface of a gasket, but vmay be
preliminarily sprayed, dipped or printed upon a
seaied without a coating of a type such as this.
It has been found that two or more coats pro
duce a very satisfactory sealing eifect together
with additionalresilience. Gaskets composed of
combinations of packing material such as asbes
sheet >of some flexible material such as paper or- tos
and metal may also be coated with this ma
on the vgaslret,'talring advantage of the normal ‘ terial to considerable advantage.
»The asbestos packing vmay be saturated with
adhesiveness or tackiness of the digested elaterite
so as to form a good bond between the two the processed elaterite, either alone or mixed
a vegetable oil.
surfaces. AIt has been found by experiment that with
In the case of gaskets which have an inner 20
carbonize Athe~paper or other foundation mate ` metal reinforcing structure, the elaterite may be
rial -will not affect the digested elaterite, thereby
causing a satisfactory coating to remain.- Obvi
ously, lthiscoating may be used for materials
other than gaskets whenever results asdescribed
above are desired.
Either before or -after the digested elaterite
thinned before application in order lto obtain
considerable penetration, and it has been found
that by its use, the fibers of >asbestos will not
have the undesirable tendency to pull away from
the metal insert.
I am aware that many changes may be made
has been applied as a coating, the same may be in the composition and numerous other ingre
colored with a pigment, if desired, so that the ' dients may be added to the digested elaterite to
form coatings suitable for various purposes with
out departing from the principles of this inven
tion, and I, therefore, do not purpose limiting the
more attractive or more
product of a certain manufacturer. - Further, the patent granted hereon otherwise than as neces
30 resultant gasket or other coated device may be
' produced in colors which might render .the same
by'the prior art.4
digested elaterite maybe preliminarily applied, sitated
I claim as my invention:
35 and the surface, while still tacky, be dusted or
otherwise covered with another material, either
colored or otherwise,lsuch as, for example, ground
vermlculite. a powdered metal or any other
>substance which may be. found desirable or
.Up to- 600° F. there is relatively no change in
the mechanical characteristics of the coating
material, nor is _there any change _in its chemical
characteristics. Over 600° F. the material be
45 comes more brittle but will notgdisintegrate or
be moved out of its original position until tem
peratures of over 1000° F. are attained. There is
a polymerizing actionl which gradually progresses
as lthe temperature rises, but ordinarily it may
50 be said that the higher the temperature becomes,
the more resistant is the material to any chemical
The elaterite itself is used as nearly as possible
in its original state, but its properties can be
55 taken advantage of- only inv its digested form.
_ The material can be applied in one or more
coats,>but one coat will actually serve-as both a
priming coat and a second coat. However, in
order to obtain a coating which is vas nearly non
1. A gasket comprising a packing material and
a unitary coating of foil and digested elaterite
2. A gasket comprising a ‘packing material and
a combination unitary coating of paper and di 40
gested elaterite applied to the surfaces thereof.
3. A covering material for gaskets, comprising
a foundation of ñbrous material and digested
elaterite applied thereto.' and a further coating
of metallic dust over the digested elaterite.
4. A covering material for gaskets, comprising
a foundation of y_fibrous material and digested
elaterite applied thereto, and a further coating
of ground vermiculite over> the digested elaterite.
5. A gasket, comprising a sheet of packing ma 50
terial, and a coating of digested elaterite on .the
surfaces> thereof, _together with a >furtherco‘ating
of graphite over the whole.y
6. A gasket, comprising a sheet of asbestos,Í andl
a covering therefor, said covering comprising a 55
relatively thin sheet of fibrous material coated
with digested elaterite.
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